I Picked Up a Sword Immortal to Be My Wife

What do you mean this beautiful girl is a Sword Immortal? Not only do you want me to cultivate immortality, you want to be my wife too? Why does it sound like I’m getting the short end of the stick... Hey, put down that sword! We live in a civilized society, so let’s talk this out! Not only do I have to keep up with all nine school subjects, I also have to save the world on the side? High school students have it way too tough these days!